Phonograph-horn



UNITED STATES PATENT OFFICE.

EDWARD c. owl m, or GRAND RAPIDS, MICHIGAN, AssIciNon TO SOVILLA OWEN,or

' GRAND RAPIDS, MICHIGAN.

rHoNoGRArH-HoRn'.

I wa ers.

Specification of Letters Patent.

' Application filed March 30,1920. Serial No. 369.968..

To all whom it concern:

Be it known that I, EDWARD C. OWEN, a.

the following 'tobe a full, clear, and exact description of theinvention, such as will enable others skilled in the art to which itappertains to makeand use the same.

This invention relates to phonograph horns, and is particularlyconcerned with a novel construction of amplifying horn which may bebuilt into very small compass yet at the same time give a perfect tonewith an elimination of all metallic sounds. The horn is especiallydesigned for use in phonographs which may be built into the compassordinarily occupied by the depth of a suit case, and is of a form andshape to give an extra long travel of the soundwaves. from the tone armto the lips of the horn with a resultant softening and mellowing of thetones, while the shape of the horn is such that the motor of thephonograph may be received and nested within one-of the curved means ofconnection of the tone arm of the phonograph to the horn, thisconnection eliminating metallic and tinny sounds such as are many timespresent.

For an understanding of the invention and the construction embodying thesame,

reference may be had to the following description, in connection withthe accompanying drawing, in which: igure 1 is a front view of the horn.Fig. 2 is a side elevation thereof. Fig. 3 is a rear elevation, and Fig.4 is a horizontal section taken through the horn between the top andbottom thereof, and looking in a downward direction a Like referencecharacters refer to like parts in the different figures of the drawing.

Patented Sept. 6,1921.

In the construction of the horn, a bottom I 1 of rectangular form isprovided, this not only furnishing the under side of the horn but also abottom or side of the phonograph case. The top 2 of the horn lies adistance above the bottom land is curved gradually upward to its frontedge as shown. The

sides 3 and 4 complete the horn so far as the outer structure isconcerned.

Side" 3 is formed into almost U-shape with legs 3 opposite side l whichis formed of two parts located substantially at right angles to eachother and connected by a smooth .eurv'ed portion, the part 3 of side 3substantially paralleling the opposite portion of the side 4 as shown.The space indicated at 5. bounded by the side 3 serves as a convenientplace in which to locate the motor of -the phonograph. f

A dividing partition is located vertically from the rear end of the hornto adjacent the front end, lying substantially midway between the sides3 and 4 and paralleling the same substantially. This partitionterminates about one quarter of the length of the horn back of the frontedges thereof as shown.

The tone arm 7 'of the phonograph passes downwardly through the motorboard 8 and its lower enlarged end 7 is secured to a block 9 of woodwhich has an openin therethrough in alinement with the passage in thetone arm, said opening communicating with an opening made in theupperside or top 2 of the horn. The rear end of the horn is closed by ablock 10 which, on its front side is downwardly and forwardly. curved todirect the sound waves into the throat of the horn and out at eitherside of the partition 6. I

A phonograph 'horn as thus constructed has proven particularly practicaland serviceable in use. With it, a phonograph may be made which inheight is no more than the depth of the ordinary suit case, the heightof the front opening in the horn being approximately four inches inpractice. ,The outward angular flare of the portion 3 of one side of thehorn gives the required on largement for the outer end of the horn foramplifying purposes, and at the same time, the horn is not reduced inlength, and a. necessary space left for the installation of-the motor,all tending to the greatest compact ness possible. The divisionpartition 6 serves to clarify the tones, serving as a separatorandsounding board and as an absorber' of cross tones which wouldordinarily conflict and make confusion of tone. The invention 'isdefined in the appended claim and I consider myself entitled to allmodiward the front, an outer side comprisingtwo portions lyingsubstantially at right angles to each other and connected by acurvedportion, an inner side of substantially U-shape,

the outer portion of which is flared out at said partition extendingfrom the rear end of the horn forwardly toward the front of the horn, ablockclosing the rear end or" the horn, and a second block' attached tothe upper side of the born at the rear end thereof, said second blockand upper side of the horn having alined openings therein, substantiallyas described. j

In testimony whereof afiix my si nature.

EDWARD C. OW'EN

